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A Region mask for a radial profile in concentric, elliptical annuli

Below is an example of the results obtained with the above procedure.

# xdata$rp110590_iml.imh - XRT/PSPC PSF AR LAC
# Thu Jul 25 11:42:57 1991
# shape x, y, [x dimension, y dimension], [angle]
 ELLIPSE(231,314,4.23,17.70,236.864)
 ELLIPSE(231,314,11.72,49.06,236.864) & !ELLIPSE(231,314,4.23,17.70,236.864)
 ELLIPSE(231,314,23.45,98.11,236.864) & !ELLIPSE(231,314,11.72,49.06,236.864)

Note: &! means ``and not''; i.e., an elliptical annulus rather than a solid ellipse.


next up previous contents
Next: *fixsaoreg* restore Up: To produce a region Previous: A box, to include
rsdc@cfa.harvard.edu
1998-06-10